Telegraph-sounder



(No Model.)

W. 0. SMITH. TELEGRAPH SOUNDER. No. 288,881. Patented Nov. 20, 1883.

' FIGJ 67 KM. 3 m

n. PETERS. mmumn m. Wuhmglom uc.

UNITED STATES PATENT OFFICE.

VALTER C. SMITH, OF PHILADELPHIA, PENNSYLVANIA.

TELEGRAPH -SOUNDER.

SPECIFICATION forming part of Letters Patent No. 288,881, date'l November 20, 1883.

Application filed February 24, 1883.

To all whom, it may concern:

Be it known that I, WALTER 0. SMITH, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a new and useful Improvement in Telegraph-Sounders, of which the following is a specification.

Myinvention consists of an arched housing, which has an arm projecting from the arch for the connection of the regulating-screw of the tension-spring connected with the soundinglever, as hereinafter described.

"*In the accompanying drawings,which make a part of this specification, Figure 1 is a plan view of my improved instrument. Fig. 2 is side elevation of the same. Fig. 3 is a rear end view of the instrument.

Like letters of reference in all the figures indicate the same parts.

In my improved instrument, A represents a housing of arch form, having an arm, 1), projecting from its rear side, which is tapped to receive the vertical screw B. O is the sounding-lever; D, the tensionspring for regulating the levenwhich is hung on fulcrum-points of screws which pass through the uprights of the housing A, one end of the spring being (N0 model.)

connected with the rear end of the lever, as seen in Figs. 2 and 3, and the other end with the end of the screw B. E is the armature, and F F the magnets.

XVith the exception of the construction of the housing A with the arm b, as above described, the instrument is substantially like other instruments. The arm is, however, an essential feature when the lever O is hung, as described, by its fulcrum-points held in the uprights of the housing, as it gives practicability to placing the screw at a suitable distance in the rear of the vertical plane of the fulcrum-points to secure the proper action of the tension-spring D in the simplest manner and in a convenient place for the operator.

I claim as my invention The arch A, having rear arm, I), carrying regulatingscrew B, in combination with the lever O, pivoted as described, and tensionspring D, connecting the lever and regulatingscrew, substantially as described.

VALTER C. SMlTH.

Witnesses:

THOMAS J. BEWLEY, STEPHEN UsTreK. 

